Хан Аспарух - Khazar attack (668)

The Nominalia of the Bulgarian khans states that Asparuh belonged to the Dulo clan and reigned for 61 years. This long period cannot be accepted as accurate due to chronological constraints, and may indicate the length of Asparuh’s life. According to the chronology developed by Moskov, Asparuh would have reigned 668–695. Other chronologies frequently end his reign in 700 or 701 but cannot be reconciled with the testimony of the Namelist. According to the Byzantine sources, Asparuh was a younger son of Kubra